edongeneralizedanalysismodel,analgorithmofestimatingtheparametersofthefilterisderived.SimulationresultsaredemonstratedinSection.Sectionconcludesthispaper..PRINCIPLESOFFPPANDGENERALIZEDANDANALYSISMODELAAschematicdiagramofatypicalFPPsystemisshowninFig..Forsimplicity,weconsideracrosssectionoftheobjectsurfaceforagivenycoordinate.Hence,theintensityoffringepatternscapturedbyCCDcameraandtheheightdistribuctedandthedeformedfringepatterns.Thismodeldoesnotdependonthenonlinearcharacteristicsofprojectionsystems[].Basedonthemathematicalmodel,Gradient-basedShiftEstimation(GSE)algorithm[]andinversefunctionanalysis(IFA)method[]havebeenpresentedtoreconstructaccurateprofilesfromnonlinearlydistortedfringepatterns.However,withIFAalgorithm,theperformanceofIFAhighlydependsonthedegreeofthepolynomialselectedforcurvefittingandinordertoachievehighaccuracy,higherdegreepolynomialshastobeused,whichaccordinglyleadstohighercomputationalcomplexity.Ontheotherha